> A little bit like how, at least according to rumor, Python hasn't done anything about its famous global interpreter lock because, when they looked into it, th

> A little bit like how, at least according to rumor, Python hasn't done anything about its famous global interpreter lock because, when they looked into it, they found that, while it would be a big performance boost in some areas, it would also cause a large performance degradation for the silent majority of people who aren't writing multithreaded Python code. OCaml is going through something like that. It currently has a GIL, and they are working to remove it and allow multithreaded code. However, they're also constantly benchmarking single core performance because it's still the main use case, and they don't want too much regression.